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# Maths CCEA C3 - Trigonometry Identity watch

1. prove identity

(tan(theta) + cot(theta))^2 = sec^2(theta) + Cosec^2(theta)
2. (Original post by apaul322)
prove identity

(tan(theta) + cot(theta))^2 = sec^2(theta) + Cosec^2(theta)
1. Take the LHS and expand the bracket. What do you get?
3. (Original post by apaul322)
prove identity

(tan(theta) + cot(theta))^2 = sec^2(theta) + Cosec^2(theta)
If I expand the LHS I got:

tan2 x + 1 + 1 + 1/tan2x which simplifies to

tan2 x + 2 + 1/tan2x

Is this what you got?
4. (Original post by emx_eco)
If I expand the LHS I got:

tan2 x + 1 + 1 + 1/tan2x which simplifies to

tan2 x + 2 + 1/tan2x

Is this what you got?
Yes thank uu

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